"wait it out?!?!" are you crazy?
One person already got shot, how many more have to get hit before you can take him out?
Bullets can travel long distances, there is no way to keep everyone safe from a mad man firing randomly.
Note: the police didn't barge into a room and shoot him either. He must have been outside firing at police! A totally aggressive move.
Maybe the police should have just all gone home, maybe he would have gotten bored with trying to kill people and put his gun down...
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